/Engine/Source/Runtime/Engine/Classes/GameFramework/Actor.h
Called by ApplyDeltaToActor to perform an actor class-specific operation based on widget manipulation. The default implementation is simply to modify the actor's draw scale.
virtual void EditorApplyScale ( const FVector & DeltaScale, const FVector * PivotLocation, bool bAltDown, bool bShiftDown, bool bCtrlDown )